<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <style>
        div{
            display: flex;
            width: 800px;
            height: 400px;
            background-color: pink;
            /* flex-direction: column;
            flex-wrap: wrap; */
        }
        div span {
            width: 150px;
            height: 100px;
            background-color: purple;
            margin-right: 5px;         
        }
        div span:nth-child(2) {
            /* 默认是0，-1比0小 */
            order:-1;
        }
        div span:nth-child(3){
            align-self: flex-end;
        }
    </style>
    <body>
        <div>
            <span>1</span>
            <span>2</span>
            <span>1</span>
            <span>1</span>
            <span>1</span>
           
        </div>
        
    </body>
    </html>